Krzysztof Z Pietrzak
Pietrzak Group
102 Publications
2023 | Conference Paper | IST-REx-ID: 13143 |
C. Hoffmann, P. Hubáček, C. Kamath, and K. Z. Pietrzak, “Certifying giant nonprimes,” in Public-Key Cryptography - PKC 2023, Atlanta, GA, United States, 2023, vol. 13940, pp. 530–553.
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2023 | Conference Paper | IST-REx-ID: 14428 |
Y. Dodis, N. Ferguson, E. Goldin, P. Hall, and K. Z. Pietrzak, “Random oracle combiners: Breaking the concatenation barrier for collision-resistance,” in 43rd Annual International Cryptology Conference, Santa Barbara, CA, United States, 2023, vol. 14082, pp. 514–546.
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2023 | Conference Paper | IST-REx-ID: 14691 |
B. Auerbach, M. Cueto Noval, G. Pascual Perez, and K. Z. Pietrzak, “On the cost of post-compromise security in concurrent Continuous Group-Key Agreement,” in 21st International Conference on Theory of Cryptography, Taipei, Taiwan, 2023, vol. 14371, pp. 271–300.
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2022 | Conference Paper | IST-REx-ID: 11476 |
J. Alwen et al., “CoCoA: Concurrent continuous group key agreement,” in Advances in Cryptology – EUROCRYPT 2022, Trondheim, Norway, 2022, vol. 13276, pp. 815–844.
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2022 | Conference Paper | IST-REx-ID: 12167 |
G. Avarikioti, K. Z. Pietrzak, I. Salem, S. Schmid, S. Tiwari, and M. X. Yeo, “Hide & Seek: Privacy-preserving rebalancing on payment channel networks,” in Financial Cryptography and Data Security, Grenada, 2022, vol. 13411, pp. 358–373.
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2022 | Conference Paper | IST-REx-ID: 12176 |
C. Hoffmann, P. Hubáček, C. Kamath, K. Klein, and K. Z. Pietrzak, “Practical statistically-sound proofs of exponentiation in any group,” in Advances in Cryptology – CRYPTO 2022, Santa Barbara, CA, United States, 2022, vol. 13508, pp. 370–399.
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2021 | Conference Paper | IST-REx-ID: 9826 |
B. Auerbach et al., “Inverse-Sybil attacks in automated contact tracing,” in Topics in Cryptology – CT-RSA 2021, Virtual Event, 2021, vol. 12704, pp. 399–421.
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2021 | Conference Paper | IST-REx-ID: 10407 |
S. Chakraborty, S. Dziembowski, M. Gałązka, T. Lizurej, K. Z. Pietrzak, and M. X. Yeo, “Trojan-resilience without cryptography,” presented at the TCC: Theory of Cryptography Conference, Raleigh, NC, United States, 2021, vol. 13043, pp. 397–428.
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2021 | Conference Paper | IST-REx-ID: 10408 |
J. F. Alwen et al., “Grafting key trees: Efficient key management for overlapping groups,” in 19th International Conference, Raleigh, NC, United States, 2021, vol. 13044, pp. 222–253.
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2021 | Conference Paper | IST-REx-ID: 10409 |
C. Kamath Hosdurg, K. Klein, and K. Z. Pietrzak, “On treewidth, separators and Yao’s garbling,” in 19th International Conference, Raleigh, NC, United States, 2021, vol. 13043, pp. 486–517.
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2021 | Conference Paper | IST-REx-ID: 10041 |
C. Kamath Hosdurg, K. Klein, K. Z. Pietrzak, and D. Wichs, “Limits on the Adaptive Security of Yao’s Garbling,” in 41st Annual International Cryptology Conference, Part II , Virtual, 2021, vol. 12826, pp. 486–515.
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2021 | Conference Paper | IST-REx-ID: 10049 |
K. Klein et al., “Keep the dirt: tainted TreeKEM, adaptively and actively secure continuous group key agreement,” in 2021 IEEE Symposium on Security and Privacy , San Francisco, CA, United States, 2021, pp. 268–284.
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2021 | Conference Paper | IST-REx-ID: 10044 |
C. Kamath Hosdurg, K. Klein, and K. Z. Pietrzak, “On treewidth, separators and Yao’s garbling,” in 19th Theory of Cryptography Conference 2021, Raleigh, NC, United States, 2021.
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2021 | Conference Paper | IST-REx-ID: 10410 |
C. Kamath Hosdurg, K. Klein, K. Z. Pietrzak, and M. Walter, “The cost of adaptivity in security games on graphs,” in 19th International Conference, Raleigh, NC, United States, 2021, vol. 13043, pp. 550–581.
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2021 | Conference Paper | IST-REx-ID: 10048 |
C. Kamath Hosdurg, K. Klein, K. Z. Pietrzak, and M. Walter, “The cost of adaptivity in security games on graphs,” in 19th Theory of Cryptography Conference 2021, Raleigh, NC, United States, 2021.
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2021 | Conference Paper | IST-REx-ID: 9969 |
K. Z. Pietrzak, I. Salem, S. Schmid, and M. X. Yeo, “LightPIR: Privacy-preserving route discovery for payment channel networks,” presented at the 2021 IFIP Networking Conference (IFIP Networking), Espoo and Helsinki, Finland, 2021.
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2020 | Conference Paper | IST-REx-ID: 8987 |
K. Z. Pietrzak, “Delayed authentication: Preventing replay and relay attacks in private contact tracing,” in Progress in Cryptology, Bangalore, India, 2020, vol. 12578, pp. 3–15.
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2019 | Conference Paper | IST-REx-ID: 6528 |
K. Z. Pietrzak, “Simple verifiable delay functions,” in 10th Innovations in Theoretical Computer Science Conference, San Diego, CA, United States, 2019, vol. 124.
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2019 | Conference Paper | IST-REx-ID: 7411 |
H. M. Abusalah, C. Kamath Hosdurg, K. Klein, K. Z. Pietrzak, and M. Walter, “Reversible proofs of sequential work,” in Advances in Cryptology – EUROCRYPT 2019, Darmstadt, Germany, 2019, vol. 11477, pp. 277–291.
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2019 | Conference Paper | IST-REx-ID: 6677 |
A. R. Choudhuri, P. Hubáček, C. Kamath Hosdurg, K. Z. Pietrzak, A. Rosen, and G. N. Rothblum, “Finding a Nash equilibrium is no easier than breaking Fiat-Shamir,” in Proceedings of the 51st Annual ACM SIGACT Symposium on Theory of Computing - STOC 2019, Phoenix, AZ, United States, 2019, pp. 1103–1114.
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2019 | Conference Paper | IST-REx-ID: 6430 |
G. Fuchsbauer, C. Kamath Hosdurg, K. Klein, and K. Z. Pietrzak, “Adaptively secure proxy re-encryption,” presented at the PKC: Public-Key Cryptograhy, Beijing, China, 2019, vol. 11443, pp. 317–346.
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2018 | Conference Paper | IST-REx-ID: 7407 |
K. Z. Pietrzak, “Proofs of catalytic space,” in 10th Innovations in Theoretical Computer Science Conference (ITCS 2019), San Diego, CA, United States, 2018, vol. 124, p. 59:1-59:25.
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2018 | Journal Article | IST-REx-ID: 107 |
S. Dziembowski, K. Z. Pietrzak, and D. Wichs, “Non-malleable codes,” Journal of the ACM, vol. 65, no. 4. ACM, 2018.
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2018 | Conference Paper | IST-REx-ID: 193 |
J. F. Alwen et al., “On the memory hardness of data independent password hashing functions,” in Proceedings of the 2018 on Asia Conference on Computer and Communication Security, Incheon, Republic of Korea, 2018, pp. 51–65.
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2018 | Conference Paper | IST-REx-ID: 302 |
B. Cohen and K. Z. Pietrzak, “Simple proofs of sequential work,” presented at the Eurocrypt: Advances in Cryptology, Tel Aviv, Israel, 2018, vol. 10821, pp. 451–467.
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2018 | Conference Paper | IST-REx-ID: 298 |
J. F. Alwen, J. Blocki, and K. Z. Pietrzak, “Sustained space complexity,” presented at the Eurocrypt 2018: Advances in Cryptology, Tel Aviv, Israel, 2018, vol. 10821, pp. 99–130.
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| arXiv
2018 | Conference Paper | IST-REx-ID: 6941 |
S. Park, A. Kwon, G. Fuchsbauer, P. Gazi, J. F. Alwen, and K. Z. Pietrzak, “SpaceMint: A cryptocurrency based on proofs of space,” in 22nd International Conference on Financial Cryptography and Data Security, Nieuwpoort, Curacao, 2018, vol. 10957, pp. 480–499.
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2017 | Conference Paper | IST-REx-ID: 605 |
J. Brody, S. Dziembowski, S. Faust, and K. Z. Pietrzak, “Position based cryptography and multiparty communication complexity,” presented at the TCC: Theory of Cryptography Conference, Baltimore, MD, United States, 2017, vol. 10677, pp. 56–81.
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2017 | Conference Paper | IST-REx-ID: 635 |
J. F. Alwen, B. Chen, K. Z. Pietrzak, L. Reyzin, and S. Tessaro, “Scrypt is maximally memory hard,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Paris, France, 2017, vol. 10212, pp. 33–62.
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2017 | Conference Paper | IST-REx-ID: 640 |
J. F. Alwen, J. Blocki, and K. Z. Pietrzak, “Depth-robust graphs and their cumulative memory complexity,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Paris, France, 2017, vol. 10212, pp. 3–32.
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2017 | Conference Paper | IST-REx-ID: 697 |
K. Z. Pietrzak and M. Skórski, “Non uniform attacks against pseudoentropy,” presented at the ICALP: International Colloquium on Automata, Languages, and Programming, Warsaw, Poland, 2017, vol. 80.
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2017 | Journal Article | IST-REx-ID: 6196 |
P. Gazi, K. Z. Pietrzak, and M. Rybar, “The exact security of PMAC,” IACR Transactions on Symmetric Cryptology, vol. 2016, no. 2. Ruhr University Bochum, pp. 145–161, 2017.
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2017 | Conference Paper | IST-REx-ID: 559 |
H. M. Abusalah, J. F. Alwen, B. Cohen, D. Khilko, K. Z. Pietrzak, and L. Reyzin, “Beyond Hellman’s time-memory trade-offs with applications to proofs of space,” presented at the ASIACRYPT: Theory and Applications of Cryptology and Information Security, Hong Kong, China, 2017, vol. 10625, pp. 357–379.
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2017 | Conference Paper | IST-REx-ID: 637 |
Z. Jafargholi, C. Kamath Hosdurg, K. Klein, I. Komargodski, K. Z. Pietrzak, and D. Wichs, “Be adaptive avoid overcommitting,” presented at the CRYPTO: Cryptology, Santa Barbara, CA, United States, 2017, vol. 10401, pp. 133–163.
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2017 | Journal Article | IST-REx-ID: 1187 |
E. Kiltz, K. Z. Pietrzak, D. Venturi, D. Cash, and A. Jain, “Efficient authentication from hard learning problems,” Journal of Cryptology, vol. 30, no. 4. Springer, pp. 1238–1275, 2017.
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2016 | Conference Paper | IST-REx-ID: 1179 |
K. Z. Pietrzak and S. Maciej, “Pseudoentropy: Lower-bounds for chain rules and transformations,” presented at the TCC: Theory of Cryptography Conference, Beijing, China, 2016, vol. 9985, pp. 183–203.
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2016 | Conference Paper | IST-REx-ID: 1231 |
J. F. Alwen, B. Chen, C. Kamath Hosdurg, V. Kolmogorov, K. Z. Pietrzak, and S. Tessaro, “On the complexity of scrypt and proofs of space in the parallel random oracle model,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Vienna, Austria, 2016, vol. 9666, pp. 358–387.
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2016 | Conference Paper | IST-REx-ID: 1233 |
G. Fuchsbauer, F. Heuer, E. Kiltz, and K. Z. Pietrzak, “Standard security does imply security against selective opening for markov distributions,” presented at the TCC: Theory of Cryptography Conference, Tel Aviv, Israel, 2016, vol. 9562, pp. 282–305.
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2016 | Conference Paper | IST-REx-ID: 1653 |
T. Okamoto, K. Z. Pietrzak, B. Waters, and D. Wichs, “New realizations of somewhere statistically binding hashing and positional accumulators,” presented at the ASIACRYPT: Theory and Application of Cryptology and Information Security, Auckland, New Zealand, 2016, vol. 9452, pp. 121–145.
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2016 | Journal Article | IST-REx-ID: 1479 |
S. Krenn, K. Z. Pietrzak, A. Wadia, and D. Wichs, “A counterexample to the chain rule for conditional HILL entropy,” Computational Complexity, vol. 25, no. 3. Springer, pp. 567–605, 2016.
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2016 | Conference Paper | IST-REx-ID: 1229 |
H. M. Abusalah, G. Fuchsbauer, and K. Z. Pietrzak, “Offline witness encryption,” presented at the ACNS: Applied Cryptography and Network Security, Guildford, UK, 2016, vol. 9696, pp. 285–303.
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2016 | Conference Paper | IST-REx-ID: 1236 |
H. M. Abusalah, G. Fuchsbauer, and K. Z. Pietrzak, “Constrained PRFs for unbounded inputs,” presented at the CT-RSA: Topics in Cryptology, San Francisco, CA, USA, 2016, vol. 9610, pp. 413–428.
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2015 | Conference Paper | IST-REx-ID: 1646 |
A. Banerjee, G. Fuchsbauer, C. Peikert, K. Z. Pietrzak, and S. Stevens, “Key-homomorphic constrained pseudorandom functions,” in 12th Theory of Cryptography Conference, Warsaw, Poland, 2015, vol. 9015, pp. 31–60.
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2015 | Conference Paper | IST-REx-ID: 1648 |
G. Fuchsbauer, Z. Jafargholi, and K. Z. Pietrzak, “A quasipolynomial reduction for generalized selective decryption on trees,” presented at the CRYPTO: International Cryptology Conference, Santa Barbara, CA, USA, 2015, vol. 9215, pp. 601–620.
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2015 | Conference Paper | IST-REx-ID: 1649 |
F. Benhamouda, S. Krenn, V. Lyubashevsky, and K. Z. Pietrzak, “Efficient zero-knowledge proofs for commitments from learning with errors over rings,” vol. 9326. Springer, pp. 305–325, 2015.
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2015 | Conference Paper | IST-REx-ID: 1654 |
P. Gazi, K. Z. Pietrzak, and S. Tessaro, “Generic security of NMAC and HMAC with input whitening,” vol. 9453. Springer, pp. 85–109, 2015.
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2015 | Conference Paper | IST-REx-ID: 1650 |
M. Skórski, A. Golovnev, and K. Z. Pietrzak, “Condensed unpredictability ,” presented at the ICALP: Automata, Languages and Programming, Kyoto, Japan, 2015, vol. 9134, pp. 1046–1057.
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2015 | Conference Paper | IST-REx-ID: 1669 |
K. Z. Pietrzak and M. Skórski, “The chain rule for HILL pseudoentropy, revisited,” vol. 9230. Springer, pp. 81–98, 2015.
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2015 | Conference Paper | IST-REx-ID: 1671 |
P. Gazi, K. Z. Pietrzak, and S. Tessaro, “The exact PRF security of truncation: Tight bounds for keyed sponges and truncated CBC,” presented at the CRYPTO: International Cryptology Conference, Santa Barbara, CA, United States, 2015, vol. 9215, pp. 368–387.
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2015 | Conference Paper | IST-REx-ID: 1675
S. Dziembowski, S. Faust, V. Kolmogorov, and K. Z. Pietrzak, “Proofs of space,” vol. 9216. Springer, pp. 585–605, 2015.
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2014 | Conference Paper | IST-REx-ID: 1927 |
G. Fuchsbauer, M. Konstantinov, K. Z. Pietrzak, and V. Rao, “Adaptive security of constrained PRFs,” presented at the Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2014, vol. 8874, pp. 173–192.
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2014 | Conference Paper | IST-REx-ID: 2185 |
Y. Dodis, K. Z. Pietrzak, and D. Wichs, “Key derivation without entropy waste,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Copenhagen, Denmark, 2014, vol. 8441, pp. 93–110.
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2014 | Conference Paper | IST-REx-ID: 2219 |
E. Kiltz, D. Masny, and K. Z. Pietrzak, “Simple chosen-ciphertext security from low noise LPN,” presented at the IACR: International Conference on Practice and Theory in Public-Key Cryptography, 2014, vol. 8383, pp. 1–18.
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2014 | Conference Paper | IST-REx-ID: 2236 |
D. Jetchev and K. Z. Pietrzak, “How to fake auxiliary input,” presented at the TCC: Theory of Cryptography Conference, San Diego, USA, 2014, vol. 8349, pp. 566–590.
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2014 | Journal Article | IST-REx-ID: 2852
M. Fischlin, A. Lehmann, and K. Z. Pietrzak, “Robust multi-property combiners for hash functions,” Journal of Cryptology, vol. 27, no. 3. Springer, pp. 397–428, 2014.
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2014 | Conference Paper | IST-REx-ID: 2082 |
P. Gazi, K. Z. Pietrzak, and M. Rybar, “The exact PRF-security of NMAC and HMAC,” presented at the CRYPTO: International Cryptology Conference, Santa Barbara, USA, 2014, vol. 8616, no. 1, pp. 113–130.
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2013 | Conference Paper | IST-REx-ID: 2259 |
J. F. Alwen, S. Krenn, K. Z. Pietrzak, and D. Wichs, “Learning with rounding, revisited: New reduction properties and applications,” vol. 8042, no. 1. Springer, pp. 57–74, 2013.
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2013 | Conference Paper | IST-REx-ID: 2258 |
E. Kiltz, K. Z. Pietrzak, and M. Szegedy, “Digital signatures with minimal overhead from indifferentiable random invertible functions,” vol. 8042. Springer, pp. 571–588, 2013.
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2013 | Report | IST-REx-ID: 2274 |
S. Dziembowski, S. Faust, V. Kolmogorov, and K. Z. Pietrzak, Proofs of Space. IST Austria, 2013.
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2013 | Conference Paper | IST-REx-ID: 2940 |
S. Krenn, K. Z. Pietrzak, and A. Wadia, “A counterexample to the chain rule for conditional HILL entropy, and what deniable encryption has to do with it,” presented at the TCC: Theory of Cryptography Conference, Tokyo, Japan, 2013, vol. 7785, pp. 23–39.
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2012 | Conference Paper | IST-REx-ID: 2048 |
S. Faust, K. Z. Pietrzak, and J. Schipper, “Practical leakage-resilient symmetric cryptography,” in Conference proceedings CHES 2012, Leuven, Belgium, 2012, vol. 7428, pp. 213–232.
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2012 | Conference Paper | IST-REx-ID: 2049 |
S. Heyse, E. Kiltz, V. Lyubashevsky, C. Paar, and K. Z. Pietrzak, “Lapin: An efficient authentication protocol based on ring-LPN,” in Conference proceedings FSE 2012, Washington, DC, USA, 2012, vol. 7549, pp. 346–365.
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2012 | Conference Paper | IST-REx-ID: 2974 |
A. Jain, S. Krenn, K. Z. Pietrzak, and A. Tentes, “Commitments and efficient zero knowledge proofs from learning parity with noise,” presented at the ASIACRYPT: Theory and Application of Cryptology and Information Security, Beijing, China, 2012, vol. 7658, pp. 663–680.
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2012 | Conference Paper | IST-REx-ID: 3282 |
Y. Dodis, K. Z. Pietrzak, E. Kiltz, and D. Wichs, “Message authentication, revisited,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Cambridge, UK, 2012, vol. 7237, pp. 355–374.
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2012 | Conference Paper | IST-REx-ID: 3280 |
K. Z. Pietrzak, “Subspace LWE,” presented at the TCC: Theory of Cryptography Conference, Taormina, Sicily, Italy, 2012, vol. 7194, pp. 548–563.
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2012 | Conference Paper | IST-REx-ID: 3281
K. Z. Pietrzak, A. Rosen, and G. Segev, “Lossy functions do not amplify well,” presented at the TCC: Theory of Cryptography Conference, Taormina, Sicily, Italy, 2012, vol. 7194, pp. 458–475.
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2012 | Conference Paper | IST-REx-ID: 3279
A. Jain, K. Z. Pietrzak, and A. Tentes, “Hardness preserving constructions of pseudorandom functions,” presented at the TCC: Theory of Cryptography Conference, Taormina, Sicily, Italy, 2012, vol. 7194, pp. 369–382.
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2011 | Conference Paper | IST-REx-ID: 3238
E. Kiltz, K. Z. Pietrzak, D. Cash, A. Jain, and D. Venturi, “Efficient authentication from hard learning problems,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Tallinn, Estonia, 2011, vol. 6632, pp. 7–26.
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2009 | Conference Paper | IST-REx-ID: 3231
E. Kiltz and K. Z. Pietrzak, “On the security of padding based encryption schemes Why We cannot prove OAEP secure in the standard model,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, 2009, vol. 5479, pp. 389–406.
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2008 | Journal Article | IST-REx-ID: 3227
P. Zubielik, J. Nadaczny, K. Z. Pietrzak, and M. Lawenda, “Elektrowiz – system of measurement data management,” Przeglad Elektrotechniczny, vol. 84, no. 10. SIGMA-NOT, pp. 239–242, 2008.
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2008 | Conference Paper | IST-REx-ID: 3225
M. Fischlin, A. Lehmann, and K. Z. Pietrzak, “Robust multi property combiners for hash functions revisited,” presented at the ICALP: Automata, Languages and Programming, 2008, vol. 5126, no. PART 2, pp. 655–666.
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102 Publications
2023 | Conference Paper | IST-REx-ID: 13143 |
C. Hoffmann, P. Hubáček, C. Kamath, and K. Z. Pietrzak, “Certifying giant nonprimes,” in Public-Key Cryptography - PKC 2023, Atlanta, GA, United States, 2023, vol. 13940, pp. 530–553.
[Submitted Version]
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| DOI
| Download Submitted Version (ext.)
2023 | Conference Paper | IST-REx-ID: 14428 |
Y. Dodis, N. Ferguson, E. Goldin, P. Hall, and K. Z. Pietrzak, “Random oracle combiners: Breaking the concatenation barrier for collision-resistance,” in 43rd Annual International Cryptology Conference, Santa Barbara, CA, United States, 2023, vol. 14082, pp. 514–546.
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2023 | Conference Paper | IST-REx-ID: 14691 |
B. Auerbach, M. Cueto Noval, G. Pascual Perez, and K. Z. Pietrzak, “On the cost of post-compromise security in concurrent Continuous Group-Key Agreement,” in 21st International Conference on Theory of Cryptography, Taipei, Taiwan, 2023, vol. 14371, pp. 271–300.
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2022 | Conference Paper | IST-REx-ID: 11476 |
J. Alwen et al., “CoCoA: Concurrent continuous group key agreement,” in Advances in Cryptology – EUROCRYPT 2022, Trondheim, Norway, 2022, vol. 13276, pp. 815–844.
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2022 | Conference Paper | IST-REx-ID: 12167 |
G. Avarikioti, K. Z. Pietrzak, I. Salem, S. Schmid, S. Tiwari, and M. X. Yeo, “Hide & Seek: Privacy-preserving rebalancing on payment channel networks,” in Financial Cryptography and Data Security, Grenada, 2022, vol. 13411, pp. 358–373.
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| arXiv
2022 | Conference Paper | IST-REx-ID: 12176 |
C. Hoffmann, P. Hubáček, C. Kamath, K. Klein, and K. Z. Pietrzak, “Practical statistically-sound proofs of exponentiation in any group,” in Advances in Cryptology – CRYPTO 2022, Santa Barbara, CA, United States, 2022, vol. 13508, pp. 370–399.
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2021 | Conference Paper | IST-REx-ID: 9826 |
B. Auerbach et al., “Inverse-Sybil attacks in automated contact tracing,” in Topics in Cryptology – CT-RSA 2021, Virtual Event, 2021, vol. 12704, pp. 399–421.
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2021 | Conference Paper | IST-REx-ID: 10407 |
S. Chakraborty, S. Dziembowski, M. Gałązka, T. Lizurej, K. Z. Pietrzak, and M. X. Yeo, “Trojan-resilience without cryptography,” presented at the TCC: Theory of Cryptography Conference, Raleigh, NC, United States, 2021, vol. 13043, pp. 397–428.
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2021 | Conference Paper | IST-REx-ID: 10408 |
J. F. Alwen et al., “Grafting key trees: Efficient key management for overlapping groups,” in 19th International Conference, Raleigh, NC, United States, 2021, vol. 13044, pp. 222–253.
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2021 | Conference Paper | IST-REx-ID: 10409 |
C. Kamath Hosdurg, K. Klein, and K. Z. Pietrzak, “On treewidth, separators and Yao’s garbling,” in 19th International Conference, Raleigh, NC, United States, 2021, vol. 13043, pp. 486–517.
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2021 | Conference Paper | IST-REx-ID: 10041 |
C. Kamath Hosdurg, K. Klein, K. Z. Pietrzak, and D. Wichs, “Limits on the Adaptive Security of Yao’s Garbling,” in 41st Annual International Cryptology Conference, Part II , Virtual, 2021, vol. 12826, pp. 486–515.
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2021 | Conference Paper | IST-REx-ID: 10049 |
K. Klein et al., “Keep the dirt: tainted TreeKEM, adaptively and actively secure continuous group key agreement,” in 2021 IEEE Symposium on Security and Privacy , San Francisco, CA, United States, 2021, pp. 268–284.
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2021 | Conference Paper | IST-REx-ID: 10044 |
C. Kamath Hosdurg, K. Klein, and K. Z. Pietrzak, “On treewidth, separators and Yao’s garbling,” in 19th Theory of Cryptography Conference 2021, Raleigh, NC, United States, 2021.
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2021 | Conference Paper | IST-REx-ID: 10410 |
C. Kamath Hosdurg, K. Klein, K. Z. Pietrzak, and M. Walter, “The cost of adaptivity in security games on graphs,” in 19th International Conference, Raleigh, NC, United States, 2021, vol. 13043, pp. 550–581.
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2021 | Conference Paper | IST-REx-ID: 10048 |
C. Kamath Hosdurg, K. Klein, K. Z. Pietrzak, and M. Walter, “The cost of adaptivity in security games on graphs,” in 19th Theory of Cryptography Conference 2021, Raleigh, NC, United States, 2021.
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2021 | Conference Paper | IST-REx-ID: 9969 |
K. Z. Pietrzak, I. Salem, S. Schmid, and M. X. Yeo, “LightPIR: Privacy-preserving route discovery for payment channel networks,” presented at the 2021 IFIP Networking Conference (IFIP Networking), Espoo and Helsinki, Finland, 2021.
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| arXiv
2020 | Conference Paper | IST-REx-ID: 8987 |
K. Z. Pietrzak, “Delayed authentication: Preventing replay and relay attacks in private contact tracing,” in Progress in Cryptology, Bangalore, India, 2020, vol. 12578, pp. 3–15.
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2019 | Conference Paper | IST-REx-ID: 6528 |
K. Z. Pietrzak, “Simple verifiable delay functions,” in 10th Innovations in Theoretical Computer Science Conference, San Diego, CA, United States, 2019, vol. 124.
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2019 | Conference Paper | IST-REx-ID: 7411 |
H. M. Abusalah, C. Kamath Hosdurg, K. Klein, K. Z. Pietrzak, and M. Walter, “Reversible proofs of sequential work,” in Advances in Cryptology – EUROCRYPT 2019, Darmstadt, Germany, 2019, vol. 11477, pp. 277–291.
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2019 | Conference Paper | IST-REx-ID: 6677 |
A. R. Choudhuri, P. Hubáček, C. Kamath Hosdurg, K. Z. Pietrzak, A. Rosen, and G. N. Rothblum, “Finding a Nash equilibrium is no easier than breaking Fiat-Shamir,” in Proceedings of the 51st Annual ACM SIGACT Symposium on Theory of Computing - STOC 2019, Phoenix, AZ, United States, 2019, pp. 1103–1114.
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2019 | Conference Paper | IST-REx-ID: 6430 |
G. Fuchsbauer, C. Kamath Hosdurg, K. Klein, and K. Z. Pietrzak, “Adaptively secure proxy re-encryption,” presented at the PKC: Public-Key Cryptograhy, Beijing, China, 2019, vol. 11443, pp. 317–346.
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2018 | Conference Paper | IST-REx-ID: 7407 |
K. Z. Pietrzak, “Proofs of catalytic space,” in 10th Innovations in Theoretical Computer Science Conference (ITCS 2019), San Diego, CA, United States, 2018, vol. 124, p. 59:1-59:25.
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2018 | Journal Article | IST-REx-ID: 107 |
S. Dziembowski, K. Z. Pietrzak, and D. Wichs, “Non-malleable codes,” Journal of the ACM, vol. 65, no. 4. ACM, 2018.
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2018 | Conference Paper | IST-REx-ID: 193 |
J. F. Alwen et al., “On the memory hardness of data independent password hashing functions,” in Proceedings of the 2018 on Asia Conference on Computer and Communication Security, Incheon, Republic of Korea, 2018, pp. 51–65.
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2018 | Conference Paper | IST-REx-ID: 302 |
B. Cohen and K. Z. Pietrzak, “Simple proofs of sequential work,” presented at the Eurocrypt: Advances in Cryptology, Tel Aviv, Israel, 2018, vol. 10821, pp. 451–467.
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2018 | Conference Paper | IST-REx-ID: 298 |
J. F. Alwen, J. Blocki, and K. Z. Pietrzak, “Sustained space complexity,” presented at the Eurocrypt 2018: Advances in Cryptology, Tel Aviv, Israel, 2018, vol. 10821, pp. 99–130.
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| arXiv
2018 | Conference Paper | IST-REx-ID: 6941 |
S. Park, A. Kwon, G. Fuchsbauer, P. Gazi, J. F. Alwen, and K. Z. Pietrzak, “SpaceMint: A cryptocurrency based on proofs of space,” in 22nd International Conference on Financial Cryptography and Data Security, Nieuwpoort, Curacao, 2018, vol. 10957, pp. 480–499.
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2017 | Conference Paper | IST-REx-ID: 605 |
J. Brody, S. Dziembowski, S. Faust, and K. Z. Pietrzak, “Position based cryptography and multiparty communication complexity,” presented at the TCC: Theory of Cryptography Conference, Baltimore, MD, United States, 2017, vol. 10677, pp. 56–81.
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2017 | Conference Paper | IST-REx-ID: 635 |
J. F. Alwen, B. Chen, K. Z. Pietrzak, L. Reyzin, and S. Tessaro, “Scrypt is maximally memory hard,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Paris, France, 2017, vol. 10212, pp. 33–62.
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2017 | Conference Paper | IST-REx-ID: 640 |
J. F. Alwen, J. Blocki, and K. Z. Pietrzak, “Depth-robust graphs and their cumulative memory complexity,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Paris, France, 2017, vol. 10212, pp. 3–32.
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2017 | Conference Paper | IST-REx-ID: 697 |
K. Z. Pietrzak and M. Skórski, “Non uniform attacks against pseudoentropy,” presented at the ICALP: International Colloquium on Automata, Languages, and Programming, Warsaw, Poland, 2017, vol. 80.
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2017 | Journal Article | IST-REx-ID: 6196 |
P. Gazi, K. Z. Pietrzak, and M. Rybar, “The exact security of PMAC,” IACR Transactions on Symmetric Cryptology, vol. 2016, no. 2. Ruhr University Bochum, pp. 145–161, 2017.
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2017 | Conference Paper | IST-REx-ID: 559 |
H. M. Abusalah, J. F. Alwen, B. Cohen, D. Khilko, K. Z. Pietrzak, and L. Reyzin, “Beyond Hellman’s time-memory trade-offs with applications to proofs of space,” presented at the ASIACRYPT: Theory and Applications of Cryptology and Information Security, Hong Kong, China, 2017, vol. 10625, pp. 357–379.
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2017 | Conference Paper | IST-REx-ID: 637 |
Z. Jafargholi, C. Kamath Hosdurg, K. Klein, I. Komargodski, K. Z. Pietrzak, and D. Wichs, “Be adaptive avoid overcommitting,” presented at the CRYPTO: Cryptology, Santa Barbara, CA, United States, 2017, vol. 10401, pp. 133–163.
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2017 | Journal Article | IST-REx-ID: 1187 |
E. Kiltz, K. Z. Pietrzak, D. Venturi, D. Cash, and A. Jain, “Efficient authentication from hard learning problems,” Journal of Cryptology, vol. 30, no. 4. Springer, pp. 1238–1275, 2017.
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2016 | Conference Paper | IST-REx-ID: 1179 |
K. Z. Pietrzak and S. Maciej, “Pseudoentropy: Lower-bounds for chain rules and transformations,” presented at the TCC: Theory of Cryptography Conference, Beijing, China, 2016, vol. 9985, pp. 183–203.
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2016 | Conference Paper | IST-REx-ID: 1231 |
J. F. Alwen, B. Chen, C. Kamath Hosdurg, V. Kolmogorov, K. Z. Pietrzak, and S. Tessaro, “On the complexity of scrypt and proofs of space in the parallel random oracle model,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Vienna, Austria, 2016, vol. 9666, pp. 358–387.
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2016 | Conference Paper | IST-REx-ID: 1233 |
G. Fuchsbauer, F. Heuer, E. Kiltz, and K. Z. Pietrzak, “Standard security does imply security against selective opening for markov distributions,” presented at the TCC: Theory of Cryptography Conference, Tel Aviv, Israel, 2016, vol. 9562, pp. 282–305.
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2016 | Conference Paper | IST-REx-ID: 1653 |
T. Okamoto, K. Z. Pietrzak, B. Waters, and D. Wichs, “New realizations of somewhere statistically binding hashing and positional accumulators,” presented at the ASIACRYPT: Theory and Application of Cryptology and Information Security, Auckland, New Zealand, 2016, vol. 9452, pp. 121–145.
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2016 | Journal Article | IST-REx-ID: 1479 |
S. Krenn, K. Z. Pietrzak, A. Wadia, and D. Wichs, “A counterexample to the chain rule for conditional HILL entropy,” Computational Complexity, vol. 25, no. 3. Springer, pp. 567–605, 2016.
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2016 | Conference Paper | IST-REx-ID: 1229 |
H. M. Abusalah, G. Fuchsbauer, and K. Z. Pietrzak, “Offline witness encryption,” presented at the ACNS: Applied Cryptography and Network Security, Guildford, UK, 2016, vol. 9696, pp. 285–303.
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2016 | Conference Paper | IST-REx-ID: 1236 |
H. M. Abusalah, G. Fuchsbauer, and K. Z. Pietrzak, “Constrained PRFs for unbounded inputs,” presented at the CT-RSA: Topics in Cryptology, San Francisco, CA, USA, 2016, vol. 9610, pp. 413–428.
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2015 | Conference Paper | IST-REx-ID: 1646 |
A. Banerjee, G. Fuchsbauer, C. Peikert, K. Z. Pietrzak, and S. Stevens, “Key-homomorphic constrained pseudorandom functions,” in 12th Theory of Cryptography Conference, Warsaw, Poland, 2015, vol. 9015, pp. 31–60.
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2015 | Conference Paper | IST-REx-ID: 1648 |
G. Fuchsbauer, Z. Jafargholi, and K. Z. Pietrzak, “A quasipolynomial reduction for generalized selective decryption on trees,” presented at the CRYPTO: International Cryptology Conference, Santa Barbara, CA, USA, 2015, vol. 9215, pp. 601–620.
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2015 | Conference Paper | IST-REx-ID: 1649 |
F. Benhamouda, S. Krenn, V. Lyubashevsky, and K. Z. Pietrzak, “Efficient zero-knowledge proofs for commitments from learning with errors over rings,” vol. 9326. Springer, pp. 305–325, 2015.
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2015 | Conference Paper | IST-REx-ID: 1654 |
P. Gazi, K. Z. Pietrzak, and S. Tessaro, “Generic security of NMAC and HMAC with input whitening,” vol. 9453. Springer, pp. 85–109, 2015.
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2015 | Conference Paper | IST-REx-ID: 1650 |
M. Skórski, A. Golovnev, and K. Z. Pietrzak, “Condensed unpredictability ,” presented at the ICALP: Automata, Languages and Programming, Kyoto, Japan, 2015, vol. 9134, pp. 1046–1057.
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2015 | Conference Paper | IST-REx-ID: 1669 |
K. Z. Pietrzak and M. Skórski, “The chain rule for HILL pseudoentropy, revisited,” vol. 9230. Springer, pp. 81–98, 2015.
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2015 | Conference Paper | IST-REx-ID: 1671 |
P. Gazi, K. Z. Pietrzak, and S. Tessaro, “The exact PRF security of truncation: Tight bounds for keyed sponges and truncated CBC,” presented at the CRYPTO: International Cryptology Conference, Santa Barbara, CA, United States, 2015, vol. 9215, pp. 368–387.
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2015 | Conference Paper | IST-REx-ID: 1675
S. Dziembowski, S. Faust, V. Kolmogorov, and K. Z. Pietrzak, “Proofs of space,” vol. 9216. Springer, pp. 585–605, 2015.
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2014 | Conference Paper | IST-REx-ID: 1927 |
G. Fuchsbauer, M. Konstantinov, K. Z. Pietrzak, and V. Rao, “Adaptive security of constrained PRFs,” presented at the Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2014, vol. 8874, pp. 173–192.
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2014 | Conference Paper | IST-REx-ID: 2185 |
Y. Dodis, K. Z. Pietrzak, and D. Wichs, “Key derivation without entropy waste,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Copenhagen, Denmark, 2014, vol. 8441, pp. 93–110.
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2014 | Conference Paper | IST-REx-ID: 2219 |
E. Kiltz, D. Masny, and K. Z. Pietrzak, “Simple chosen-ciphertext security from low noise LPN,” presented at the IACR: International Conference on Practice and Theory in Public-Key Cryptography, 2014, vol. 8383, pp. 1–18.
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2014 | Conference Paper | IST-REx-ID: 2236 |
D. Jetchev and K. Z. Pietrzak, “How to fake auxiliary input,” presented at the TCC: Theory of Cryptography Conference, San Diego, USA, 2014, vol. 8349, pp. 566–590.
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2014 | Journal Article | IST-REx-ID: 2852
M. Fischlin, A. Lehmann, and K. Z. Pietrzak, “Robust multi-property combiners for hash functions,” Journal of Cryptology, vol. 27, no. 3. Springer, pp. 397–428, 2014.
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2014 | Conference Paper | IST-REx-ID: 2082 |
P. Gazi, K. Z. Pietrzak, and M. Rybar, “The exact PRF-security of NMAC and HMAC,” presented at the CRYPTO: International Cryptology Conference, Santa Barbara, USA, 2014, vol. 8616, no. 1, pp. 113–130.
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2013 | Conference Paper | IST-REx-ID: 2259 |
J. F. Alwen, S. Krenn, K. Z. Pietrzak, and D. Wichs, “Learning with rounding, revisited: New reduction properties and applications,” vol. 8042, no. 1. Springer, pp. 57–74, 2013.
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2013 | Conference Paper | IST-REx-ID: 2258 |
E. Kiltz, K. Z. Pietrzak, and M. Szegedy, “Digital signatures with minimal overhead from indifferentiable random invertible functions,” vol. 8042. Springer, pp. 571–588, 2013.
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2013 | Report | IST-REx-ID: 2274 |
S. Dziembowski, S. Faust, V. Kolmogorov, and K. Z. Pietrzak, Proofs of Space. IST Austria, 2013.
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2013 | Conference Paper | IST-REx-ID: 2940 |
S. Krenn, K. Z. Pietrzak, and A. Wadia, “A counterexample to the chain rule for conditional HILL entropy, and what deniable encryption has to do with it,” presented at the TCC: Theory of Cryptography Conference, Tokyo, Japan, 2013, vol. 7785, pp. 23–39.
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2012 | Conference Paper | IST-REx-ID: 2048 |
S. Faust, K. Z. Pietrzak, and J. Schipper, “Practical leakage-resilient symmetric cryptography,” in Conference proceedings CHES 2012, Leuven, Belgium, 2012, vol. 7428, pp. 213–232.
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2012 | Conference Paper | IST-REx-ID: 2049 |
S. Heyse, E. Kiltz, V. Lyubashevsky, C. Paar, and K. Z. Pietrzak, “Lapin: An efficient authentication protocol based on ring-LPN,” in Conference proceedings FSE 2012, Washington, DC, USA, 2012, vol. 7549, pp. 346–365.
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2012 | Conference Paper | IST-REx-ID: 2974 |
A. Jain, S. Krenn, K. Z. Pietrzak, and A. Tentes, “Commitments and efficient zero knowledge proofs from learning parity with noise,” presented at the ASIACRYPT: Theory and Application of Cryptology and Information Security, Beijing, China, 2012, vol. 7658, pp. 663–680.
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2012 | Conference Paper | IST-REx-ID: 3282 |
Y. Dodis, K. Z. Pietrzak, E. Kiltz, and D. Wichs, “Message authentication, revisited,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Cambridge, UK, 2012, vol. 7237, pp. 355–374.
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2012 | Conference Paper | IST-REx-ID: 3280 |
K. Z. Pietrzak, “Subspace LWE,” presented at the TCC: Theory of Cryptography Conference, Taormina, Sicily, Italy, 2012, vol. 7194, pp. 548–563.
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2012 | Conference Paper | IST-REx-ID: 3281
K. Z. Pietrzak, A. Rosen, and G. Segev, “Lossy functions do not amplify well,” presented at the TCC: Theory of Cryptography Conference, Taormina, Sicily, Italy, 2012, vol. 7194, pp. 458–475.
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2012 | Conference Paper | IST-REx-ID: 3279
A. Jain, K. Z. Pietrzak, and A. Tentes, “Hardness preserving constructions of pseudorandom functions,” presented at the TCC: Theory of Cryptography Conference, Taormina, Sicily, Italy, 2012, vol. 7194, pp. 369–382.
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2011 | Conference Paper | IST-REx-ID: 3238
E. Kiltz, K. Z. Pietrzak, D. Cash, A. Jain, and D. Venturi, “Efficient authentication from hard learning problems,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Tallinn, Estonia, 2011, vol. 6632, pp. 7–26.
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2009 | Conference Paper | IST-REx-ID: 3231
E. Kiltz and K. Z. Pietrzak, “On the security of padding based encryption schemes Why We cannot prove OAEP secure in the standard model,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, 2009, vol. 5479, pp. 389–406.
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2008 | Journal Article | IST-REx-ID: 3227
P. Zubielik, J. Nadaczny, K. Z. Pietrzak, and M. Lawenda, “Elektrowiz – system of measurement data management,” Przeglad Elektrotechniczny, vol. 84, no. 10. SIGMA-NOT, pp. 239–242, 2008.
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2008 | Conference Paper | IST-REx-ID: 3225
M. Fischlin, A. Lehmann, and K. Z. Pietrzak, “Robust multi property combiners for hash functions revisited,” presented at the ICALP: Automata, Languages and Programming, 2008, vol. 5126, no. PART 2, pp. 655–666.
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